public link: https://calendar.google.com/calendar/u/1?cid=Y185azBiZjkxcnJmb3A1ZDA0NjI4cmFpdjNnc0Bncm91cC5jYWxlbmRhci5nb29nbGUuY29tiCal: https://calendar.google.com/calendar/ical/c_9k0bf91rrfop5d04628raiv3gs%40group.calendar.google.com/public/basic.ics